GEAR BOX U.S. Navy Seaman Christopher Cockroft installs a tail gear box cover on an SH-60F Sea Hawk helicopter aboard the amphibious command ship USS Blue Ridge in the Pacific Ocean, April 24, 2009. Cockroft is an aviation machinist's mate. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 558914-T-MVB57-722.jpg Photo Gallery